Drill press attachment



Aug' 7, 1951 A. coLuccl ET A1. 2,563,582

DRILL PRESS ATTACHMENT Filed July 2, 1948 2 Sheets-Sheet l lll/g 5 27 INVENTORS 71. Dc fc4 a c BY 76cm-f@ T?. )f1-ve el..

A T roe/Ey Aug' 7, 1951 A. coLUccl ET AL DRILL PRESS ATTACHMENT 2 Sheets-Sheet 2 Filed July 2, 194s INVENTORS #DO (.Ol urs,

BY RCh/HRD Yufve-L A TTO/QNEY Patented Aug. 7, 1951 DRILL PRESS ATTACHMENT Aldo Colucci and Richard R. Yungel, Brooklyn,

N. Y., assignors, by direct and mesne assignments, of one-half to said Colucci and one-half to Milton Freshman, Brooklyn, N. Y.

Application July 2, 1948, Serial No. 36,664

3 Claims.

This invention relates to drill press attachments. More particularly our invention pertains to an attachment for converting a vertical spindle drill press into a horizontal spindle, precision, high speed machine tool, such, for example, as a surface grinder.

It is an object of our invention to provide an attachment of the character described which is rugged in construction, constitutes relatively iew and simple parts and yet is capable eiciently of performing high precision work.

It is another object of our invention to provide an attachment of the character described by means of which a conventional vertical spindle drill press can be transformed rapidly into a high precision machine tool.

It is an additional object of our invention to provide an attachment of the character described which is so constructed and arranged that it can be secured to or removed from a vertical spindle drill press without impairing the high operative precision of the attachment.

It is a further object of our invention to provide an attachment of the character described which is simple to put on and remove and is easy to operate.

It is still another object of our invention to provide an attachment oi the character described which is comparatively compact, and requires no parts which would interfere with normal operation of the attachment as an ordinary machine tool.

It is still another object of our invention to provide an attachment of the character described having a fine control for high precision work and which use the hand feed of the drill for coarse control.

Other objects of our invention will in part be obvious and in part hereinafter will be point out.

Our invention accordingly consists in the features of construction, combinations of elements and arrangements of parts which Will be exempliiied in the construction hereinafter described, and of which the scope of application will be indicated in the appended claims.

In the accompanying drawings, in which is shown one of the various possible embodiments of our invention,

Fig. 1 is a front view of a vertical spindle drill press to which there is secured an attachment embodying our invention;

Fig. 2 is an enlarged sectional view through said attachment the same being taken substantially along the line 2--2 of Fig. l;

Figs. 3 and 4 are sectional views taken substantially along the lines 3--3 and 4-4, respectively, of Fig. 2;

Fig. 5 is a fragmentary front view of the attachment casing with the machine tool removed; and

Fig. 6 is a fragmentary sectional view taken substantially along the line 6-6 of Fig. 4.

Referring now in detail to the drawings, the reference numeral IIJ denotes a vertical spindle drill press of conventional construction on which there is mounted an attachment I2 constructed in accordance with our invention.

Said drill press is characterized by the presence of a stationary casing I4 having a vertical bore in which a sleeve I 6 is vertically slidably reciprocable, the sleeve being restrained against rotary movement about a vertical axis. As in conventional, said sleeve carries a rack gear (not shown) which meshes with a pinion (also not shown) secured to a horizontal shaft journaled on the casing I4. Said shaft is turned by a handle I8 which provides a coarse adjustment for the vertical position of the sleeve. 'I'he sleeve may be locked in any adjusted vertical position by means of a set screw 20 threaded in the casing.

A vertical drill spindle 2| is rotatably journaled inside of the sleeve and suitable means is included to prevent relative axial movement of the sleeve and spindle. Some suitable source of motive power, for example an Aelectric motor, may be provided, the same optionally being mounted on the sleeve and being coupled to the drill spindle. The tip 22 oi the drill spindle is shaped to a standard Morse taper and is adapted to be wedged into a conventional drill chuck (not shown). The sleeve I6 has a depending threaded portion 24 on which a press-off ring 26 is screwed for removing elements wedged on the spindle tip.

The drill column 21 of the press ID is provided with a work table 28 having a long feed 30 and a cross feed 32 of conventional construction. Additionally, the Work table includes a suitable mechanism, such as a magnetic chuck 34, for holding work, or a jig or fixture in which Work is carried.

The attachment l2 comprises a sleeve clamp 36 which constitutes a heavy steel tube with a longitudinal slot 38 across which a clamp screw 40 extends, the tip of the screw being threadedly received in a tapped bore 42 on one side of the slot and the head of the screw being located in a recess 44 on the other side so that when the screw is tightened, the clamp is constricted. The sleeve clamp is in one piece with an upper or stationary portion 46 of the casing for our attachment. The other and movable portion of said casing comprises an intermediate part 48 and a lower part 5U.

The two portions of the casing are provided with means for micrometrically lowering or raising the movable portion with respect to the stationary portion and for preventing relative rotation of said portions. To this end, the intermediate part 48 includes a pillar bracket 5| rigidly secured thereto and the part 46 a rigidly secured bushing bracket e2. The pillar bracket carries a plurality, for example, four, erect pillars 54, the same being slidably received in. a set of matching pillar bushings 56. With this arrangement, the intermediate part 48 is constrained for an exactly linear movement.

The micrometric vertical adjusting means includes a threaded portion 58 on the lower end of the casing part il@ and another threaded portion 6|! on the upper portion of the intermediate These two threaded' portions have threads of opposite inclination. AThat is to sa'y, one' of the threaded portions, e. g. the portion 58, has a right hand thread and the other portion 60, a left hand thread. Said two threaded portions engage a micrometer adjusting sleeve 62 having two tapped portions 64, 56 which mesh jwith the' .threaded portions 66 respectively whereby, when thesleevejEZ is turned in one direction, the intermediate casing part i8 will be lowered Withrespect to the stationary part 46, and whenthe sleeve is turned in the opposite direction, the intermediate part will be raised.

Said sleeve mayn have a lnurled zone 68 to facilitate manual manipulation. In addition, the sleeve preferably carries a scale 'lll cooperating with a pointer 12 mounted on the stationary casing part 46 to provide a visual indication of the position of the attachment tool. Means also may be included to lock the adjusting sleeve62 in any selected position. Said means comprises a pair of set screws "|4, 'i6 threaded in the sleeve and adapted to engage the stationary and the intermediatecashig parts t6, i8 at points removed from the threaded portions 5B, Sil.

Ihe casing part -`is rigidly connected to the intermediate part at. Said casing part 50 is hollow and is designed, as will be described in more detail hereinafter, Vto receive a horizontal tool spindle 18. The casing part 5@ is horizontally elongated and is shaped to a tubular conguration concentric with the tool spindle. However, for the purpose of appearance, the bottom of the casing part 5 Ilis attened as best seen in Fig. 5. In order to better interfit the two casing parts 48, 50, the lower end 86 ofthe intermediate part 48 is made saddle-shaped to negatively match the conguration of the top side of the casing part 50. These two casingparts are held Yto- Vget'herrby bolts 82.

The tool spindle T13 has its rear end presstted in the inner race 8G lof an antifriction bearing, such as a ball bearing 66, whose outer race isA seated in a recess 88 formed at the baclr of the casing part 56. Said ball bearing is held in place by a rear face plate 92 attached to the back of the casing part 56, the face plate pressing against the outer race ci the ball bearing 2t and thus forcing the ball bearing against its seat in the recess 38. For this purpose said plate 96 is providedV with an abutment ring 92. The plate 96 is held ,in position by machine screws 94.

YAdjacent its forward end the tool spindle 'i8 is rotatably mounted in another bali bearing 96 tending groove |26 in the shaft |53.

4 which is held in place in the same'fashion as the ball bearing 86 by a front face plate S8 and machine screws |66.

The front end of the tool spindle includes suitable means for mounting a metal removing tool. For example, this end of the spindle may be provided with an rintegral ilange |62 and a threaded tip |64 on which a grinding wheel |95 (Fig. l) is held in place by a nut |08 threaded on the tip of the tool spindle. It will be understood that the spindle may be provided with other types of'work holding tips or that the work holding tiprillustrated can be provided with adapters to render it capable of holding other kinds of metal' removing tools.

The attachment l2 also includes a power transmission adapted to be coupled at its input end to the drill spindle 2| and having its output end operatively connected to the tool spindle, said transmission being so constructed that its operation will not be affectedby movement of the micrometric sleeve which changes theY position of the work spindle 'F8 with respect to the tip 22 of the drill spindle.

In the preferred form of my invention, the aforesaid transmission comprises a vsocket lill having a Morse taper which canbe wedged on the tipY cf the drill spindle. Said soclret has a depending Vstep which is pressed in aV roller bearing il? whose outer raceris pressed in a recess H4 within the stationary casing part 46. The bearing H2 has two sets of oppositely inclined tapered rollers H6 so that said bearingV Awill take up thrust.

The step I I is in one piece with a downwardly extending shaft H8 which is telescopically received in a tube l. Said tube carries a screw |22 having an inwardly directed reduced cylindrical tip |24 which is slidable in an'axially ex- Such arrangement permits relative axial movement of the shaft H6 and tube |26 while still maintaining a driving connection therebetween, the tip |24 and groove |26 in effect constituting a spline connection. Y 1 The tube |26 is permanently secured to a vertical shaft I28. Said tube is mounted by a roller bearing |30 in a recess |32 in the intermediate casing part 43, said roller bearing |39 being identical with the roller bearing H2 and adapted to take up thrust. It thus will be seen that movement of the micrometric sleeve 62 willnot affect the drive from the socket HQ to the shaft |28. A miter gear |34 is pinned to the lower end of the shaft |28 and a meshing miter gear |36 is similarly affixed to the tool spindle i3 whereby rotation of the socket l |0 will turn over the tool spindle.

For a purpose which will soon be apparent, means is provided temporarily to tie the` socket ||0 to the stationary casing part 46 in such fashion that, when said means is effective, it will preventv any stress imposed on the casing from `being applied to any part of the power transmission except the, socket. Said means includes an annular groove |38 (Fig. 6) on the exterior of the socket ||6 above the step III. This Agroove is adapted to snugly receive the tips of a` pair of locking fingers |46, |42 (Figs-4 and 6). 'Desirably, the groove |38 is slightly flared and the tips of the fingers matchinglyf tapered to .secure an extremely snug fit between these elements. l Thel two locking fingers are disposed on diametrically opposite sides of the socket and are received Iin. grooves |44 in a pair of registered discs M6,` |48.

These discs are superposed and jointly are seated on a shoulder at the bottom of the clamp 36, said discs being secured to one another by machine screws |50.`

Means is included to urge the locking fingers apart to their normal position shown in Fig. 4. Such means conveniently comprises a wire spring |52 whose two ends have outwardly facing concave portions |54, |56 engaging studs |51 on the locking fingers. The spring is bowed and tensed and is held in position by a pair of bolts |58 which also serve to hold the discs |46, |48 in place. It will be observed that the upper disc |46 is slotted to permit free movement of the studs |51.

To use the attachment l2, the drill chuck is pressed off the spindle 2| and the clamping tube 36 slipped on the lower end of the sleeve I6 whereby to engage the socket ||0 with the tapered lower end 22 of the drill spindle. The operator then presses the locking fingers |40, |42 inwardly to engage the annular groove |38 on the collar and raps with a hammer on the flat bottom of the lower casing part 50 so as to wedge the socket on to the lower end of the drill spindle.

It will be observed that, when the locking fingers engage said groove, the fingers will transmit impact stress directly to the collar. This prevents the imposition of such stress on the roller bearings ||2, and maintains the precision of the attachment.

Next, the clamp screw is tightened with the tool spindle 18 oriented in a desired direction. The set screw 20 then can be loosened and, by manipulating the handle I8, the tool spindle can be set properly above the work. After the set screw 20 is tightened, further adjustment of the height of the spindle 18 is accomplished by rotating the micrometric adjusting sleeve 62. Fine feed of the spindle is accomplished in the same manner, i. e., by manipulation of the sleeve 62.

It thus will be seen that there is provided a device in which the several objects of this invention are achieved, and which is well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiment above set forth, it is to be understood that all matter herein described or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

Having thus described our invention, we claim as new and desire to secure by Letters Patent:

1. An attachment for converting into a machine tool a drill press including a vertical spindle rotatable within and movable axially with a sleeve, the lower end of said spindle being tapered: said attachment comprising a casing including two portions, one of said portions having a tubular clamp adapted to be rigidly CLT of said sleeve, said second casing portion is moved micrometrically with respect to said first casing portion, a tool spindle perpendicular to said shaft, bearings carried by said second casing portion for rotatably mounting said tool spindle, said shaft constituting part of a power transmission having at its input end a socket adapted to be wedge-fitted on the tapered lower end of the drill press spindle, a gear on said tool spindle, a second gear meshing with said first gear, said first named shaft interconnecting said second gear and said socket, said first-named shaft including a splined portion and means riding in the splines to permit extension of said first-named shaft in a direction parallel to its axis, and means temporarly to tie said casing to said socket, said means including an element carried by said casing and mounted for sliding movement between two extreme positions in a direction transverse to the axis of the first-named shaft, an annular groove in the socket, said groove lying in the same plane as said element and being positioned to snugly receive said element in one of the latters extreme positions and to be clear of said element in the other position of the latter and means to urge said element in a direction away from said groove.

2. An attachment for converting into a machine tool, a drill press including a vertical spindle rotatable within and movable axially with a sleeve, the lower end of said spindle being tapered: said attachment comprising a clamp adapted to be secured to said sleeve, a casing element integral with said clamp, a power transmission shaft, a bearing mounted in said casing element and rotatably supporting said shaft, a tapered socket on the input end of said shaft, said socket being located coaxially of said clamp and being adapted to be wedge-fitted on the tapered end of the drill spindle, a second casing element, one of said, casing elements having a right-hand male screw thread disposed concentrically with respect to said shaft, the other casing element having a left-hand male screw thread disposed concentrically with respect to said shaft, a sleeve having right-hand and left-hand female threads meshing with the left-hand and righthand male threads respectively of the casing elements, one of said casing elements carrying a bracket, a rod mounted on said bracket and extending parallel to said shaft, the other said casing elements carrying a bracket, Said second bracket having a bore extending parallel to said y shaft in which the rod is snugly and slidably remounted on the sleeve of the drill press, a shaft,

a bracket carried by each of said portions, one of said brackets including a guide pillar extending parallel to the axis of the shaft and the other of said brackets including a pillar bushing in which said pillar is slidable whereby said second casing portion is restricted for movement in a direction parallel to the axis of the shaft, a right hand thread disposed on one of said casing portions concentrically of said shaft, a left hand thread disposed on the other of said casing portions concentrically of said shaft, a sleeve having right and left hand threads matching and meshing with the right and left hand threads 0f said casing portions whereby, upon rotation ceived, whereby upon rotation of said sleeve the second named casing element is moved micrometrically with respect to the first named casing element in a direction parallel to said shaft, an intermediate transmission shaft, a bearing mounted in the second casing element and rotatably supporting said intermediate shaft in alignment with the first named shaft, one of said shafts having a spline and the other of said shafts having a key riding in the spline whereby said intermediate shaft is extensible with respect to said transmission shaft, a third shaft, a bearing mounted in the second casing element and disposed to rotatably support the third shaft at right angles to the intermediate shaft, and a kinematic train interconnecting the third shaft and the intermediate shaft.

3. An attachment as set'forth in claim 2 wherein means is provided temporarily to secure the socket to the first named casing element so as to prevent relative movement thereby in the direc- REFERENCES CITED The following references are of record in the file' of' this patent:

Number Number UNITED STATES PATENTS Name Date llrrntagev JulyV 116,. 1929 Le Blond 1 Dec; 5, 1939 White Marl 15,1949

FOREIGN PATENTS M TH 

